Ack! I'm having trouble finding a range hood, and our cabinet guy needs to know our specs ASAP so he can build the cabinets for that wall.

Here's what we need:

• We're installing a 36" Bosch 800 Series gas cooktop (59,000 BTU), so I need a unit that's around 600 cfm. (We have a 32-year-old home that has several drafty doors, so we're not too worried about MUA. Still, I don't want to go over 600 cfm.)
• Our existing vent is 6". The ducting runs about 13 feet from the range wall to the outside vent.
• We need an under-cabinet style because (1) we have an exposed outlet on the wall that wouldn't be covered by a chimney, and (2) even though we moved the ducting over one bay in the ceiling, it still won't go straight down. The ducting needs to bend to reach the center of the cooktop wall.

The main problem is finding a highly rated hood with 6" duct. Most seem to be 7". It also may help to know that we don't do much frying, apart from sauteing or browning. Definitely not a deep-frying family.

Suggestions welcomed!